Canon EOS 5D Mark II Instruction Manual - Page 11

Installing the Zoom Clamp & Gear Sleeve On the Type 1 Lenses The Zoom Clamp has springs so it can be expanded to fit over the Zoom Ring of the lens - figure C, page 11. Install the Zoom Clamp with the extension tabs toward the rear element of the lens. After installing the Zoom Clamp and Gear Sleeve - figures D & E, page 12, install the Lens Port and rotate the Zoom Ring on the lens. If the Zoom Ring and Gear Sleeve do not mesh properly, install the rubber strips (supplied) to the inside diameter of the Zoom Clamp as shown in figure F, page 12. Two thicknesses of rubber strips are provided. Start by installing the thinnest rubber strips. If the Zoom Clamp still is not tight enough and meshes improperly with the Gear Sleeve, use the thicker rubber strips. Reinstall the Zoom Clamp, Sleeve. Mesh Gear Sleeve teeth with Black Housing Drive Gear, figure G, page 14, and then install the Lens Port. After installing the port, pages 15 & 16, rotate the housing Zoom Control Knob to see that the Gear Sleeve is properly rotating the lens Zoom ring. Type 1 lens mounted to camera zoom ring Figure C 11